A centrifugal production process for separating gypsum

Abstract

The invention relates to the technical field of flue gas treatment, in particular to a centrifugal production technology for gypsum separation. The technology at least comprises steps in sequence as follows: a slurry thickening step for adjusting solid mass fraction of diluted gypsum slurry to 20%-30%, a slurry homogenization step for stirring the slurry uniformly and a centrifugal dewatering step for realizing dewatering and washing of the slurry and scraping treatment of a filter cake. According to the production technology, impurities in a liquid can be removed effectively and concentrated to discharged liquor, on one hand, high-yield and high-quality gypsum products can be obtained, on the other hand, potential threat of impurity dispersion to the environment is eliminated, and therefore, the production technology is multi-purpose. With the adoption of the technology, fully-automatic production can be realized, online monitoring and control can be realized, data are stored automatically, a production statement is generated automatically, and besides, the technology has the advantages that the system integration degree is quite high, and the technological process is shorter, fewer material operation links are needed, totally-enclosed operation can be realized and the like, less influence is produced on the environment, and the technology is suitable for current industrial production.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment, in particular to a centrifugal production process for separating gypsum. Background technique [0002] Limestone (lime)-gypsum wet desulfurization is currently the main method of flue gas desulfurization in the power and non-ferrous industries. It has the advantages of mature and reliable technology, high desulfurization efficiency, rich source of desulfurizer raw materials, and comprehensive utilization of by-product gypsum. In the power industry, due to the large amount of flue gas treatment and the high concentration of sulfur dioxide in the flue gas, limestone is usually used as a desulfurizer; if the concentration of sulfur dioxide in the tail gas of acid production is low, the amount of flue gas is not large, and the actual conditions on site are limited, limestone can also be used for desulfurization. agent. The desulfurization unit is mainly composed of desulfurization tower, ...

AI Technical Summary

Problems solved by technology

At present, there is no mature process and complete sets of equipment in the gypsum production link, the process parameters are not specific, and the supporting equipment is not perfect, which leads to most manufacturers still in the state of technological exploration, whether it is for key process routes or main process parameters, or even There is no clear concept of the specific requirements and interrelationships of supporting equipment, so that the quality of gypsum products in the limestone / lime-gypsum wet desulfurization process cannot be distinguished, and the quality grades vary greatly

Since there is no specific process and system as a comparison, it is impossible to propose a complete and reliable plan for the improvement of the quality of gypsum products. On the one hand, the market competitiveness of the enterprise is reduced, and on the other hand, the impurity content in the effluent is high, and the biochemical indicators High, greater threat to the environment

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